What CSS should I learn?

Answer 1

both of them

Answer 2

It depends on what you want to learn. CSS3 is a newer version of CSS, and CSS is the older version.

Answer 3

I recommend checking this to get an idea of how CSS versions and modules are organized

https://developer.mozilla.org/en-US/docs/Web/CSS/CSS3

Answer 4

css - cascading style sheets
it makes ur web page in color full and animate and control the page

Answer 5

html 5 + css3 makes you a good web designer

Answer 6

Thanks everyone you'll all are very helpful.